@Article{jue:08j,
  author =       {B. Bastl and B. J\"uttler and M. L\'avi\v{c}ka and J. Kosinka},
  title =        {Computing Exact rational Offsets of Quadratic Triangular B\'ezier Surface Patches},
  journal = 	 {Computer-Aided Design},
  year = 	 {2008},
  volume =       {40},
  pages =        {197-209},
}